Garden calculators that show their work.

Bed plans, planting dates, spacing, soil and fences, worked out for your own garden, with the formula and sources on every page.

60 lettuce at 9 in, staggered

An 8 by 4 foot raised bed planted by the plant spacing calculator.

Numbers you can trace back.

How we calculate
  • Sources you can check

    Every calculator lists the extension service guides its numbers come from.

  • Feet or metres

    Switch units at any time. Your measurements convert with you.

  • Reviewed and dated

    Each page shows when our editors last checked it.